NIS - libdoc.who.int - World Health Organization

WHO monographs on medicinal plants commonly used in the Newly Independent States (NIS)
Total ash
Not more than 20% (1) or not more than 15% (38).
Acid-insoluble ash
Ash insoluble in 10% hydrochloric acid not more than 6% (1).
Sulfated ash
No information available.
Water-soluble extractive
Not less than 30% (27).
Alcohol-soluble extractive
No information available.
Loss on drying
Not more than 14% (1).
Pesticide residues
The recommended maximum sum limit of aldrin and dieldrin is not more
than 0.05 mg/kg (39). For other pesticides, see the European pharmacopoeia
(39) and the WHO guidelines on quality control methods for medicinal
plant materials (37) and pesticide residues (40).
Heavy metals
For maximum limits and analysis of heavy metals, consult the WHO
guidelines on quality control methods for medicinal plant materials (37).
Radioactive residues
Where applicable, consult the WHO guidelines on quality control methods
for medicinal plant materials (37) for the analysis of radioactive isotopes.
Other purity tests
The content of mineral matter not more than 1% (1). Chemical, sulfated
ash and alcohol-soluble extractive tests are to be established in accordance
with national requirements.
Chemical assays
Contains not less than 12% polysaccharides (1).
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